Search for $h_{c}\rightarrow\pi^+\pi^-J/\psi$ via $\psi(3686)\rightarrow \pi^0\pi^+\pi^-J/\psi$

TL;DR

This study searches for a specific hadronic transition in charmonium states using a large data sample, but finds no evidence and sets the most stringent upper limit to date on the process.

Contribution

First search for the transition $h_c ightarrow ext{ extpi}^+ ext{ extpi}^-J/ ext{ extpsi}$ via $ ext{ extpsi}(3686)$ decays, establishing the tightest upper limit on its branching fraction.

Findings

No signals observed for the transition.

Upper limit on the product branching fraction is $2.0 imes10^{-6}$ at 90% CL.

This is the most stringent upper limit to date.

Abstract

Using a data sample of $448.1\times10^6$ $\psi(3686)$ events collected with the BESIII detector operating at the BEPCII, we perform search for the hadronic transition $h_c\rightarrow\pi^+\pi^-J/\psi$ via $\psi(3686)\rightarrow\pi^0h_c$. No signals of the transition are observed, and the upper limit on the product branching fraction $\mathcal{B}(\psi(3686)\rightarrow\pi^0h_c)\mathcal{B}(h_c\rightarrow\pi^+\pi^-J/\psi)$ at the 90% confidence level is determined to be $2.0\times10^{-6}$. This is the most stringent upper limit to date.